Ouch is right!
BTW, you can go ahead and use the skewer you use on the trainer when you ride the bike outside--assuming it's tightened correctly. When I had a trainer, I didn't bother swapping out the trainer skewer until spring, i.e., when I knew I wouldn't be using the trainer again until winter.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher